Bastien, 13, is an only child… well, sort of. The various divorces and new relationships of his parents and step-dads have brought Bastien six step brothers and sisters. This means lots of moms, lots of dads, and many bedrooms where the kids spend a few nights, then pack up and move to the other parent’s home. Constantly carrying their lives on their backs, the children call themselves “The Turtles”. But now, Bastien has had enough. And he’s got a revolutionary plan: The seven kids will live in one place and the grownups will be the ones rotating! Confronted with how complicated they’ve made their kids’ lives, the parents reluctantly agree to give Bastien’s model a try… Secretly hoping that everything will return to normal soon. But nothing works out as expected including the grownups who discover thanks to the seven kids, that a fragmented family can perhaps become united in solidarity, in this great big loving mess of a home!